F.P. Journe Chronomètre Optimum Ref. CO ladies gracefully transitioning to a black

gracefully transitioning to a black gradient at the edges

8 mm white gold case is complemented by a sapphire crystal case back

the movement boasts a power reserve of approximately 45 to 55 hours

The central 21k gold rotor is beautifully decorated with the same horizontal motif

62 mm thickness

F.P. Journe Chronomètre Optimum Ref. CO ladies gracefully transitioning to a blackThe F. P. Journe Chronomtre Optimum, reference CO, houses the manually wound Calibre 1510 in 18K rose gold, available in 40mm or 42mm cases of platinum or 18K 6N gold, with an overall height of 9. 5mm. The movement brings together a remarkable concentration of horological engineering rarely combined in a single watch, two parallel mainspring barrels, a one second constant force remontoire at 11 o'clock, and the High Performance Bi axial Escapement